Hey, sorry for the late response.
The Highlander season was cancelled due to the lack of ready teams. More info on that here – http://steamcommunity.com/groups/eTFCL#announcements/detail/558845768046520794
If you guys want to play in an upcoming highlander season, just stay readied up. We’ll launch the season once we have enough teams up and ready to go, and will post an announcement about it when that happens.